You might not always enjoy them, but YouTube parties are inevitable, and can actually be great fun. Copying one of the smaller features of Airtime, Google is now offering its users the ability to watch YouTube videos in sync with each other via Google+, so you needn't leave your desk to obsessively watch cat videos with friends.

Airtime is a new startup by Sean Parker and Shawn Fanning (of Napster fame) that recycles an old…
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There's now a YouTube party mode in Google+ Hangouts, which makes it possible to share single videos or playlists between users which then run in sync. It's probably the best feature to appear on Google+ yet—but then, that's not a difficult title to grab. [YouTube via Engadget]